Slurry shield split launching construction method for water-rich sandy gravel stratum

A mud-water shield, split-start technology, applied in the direction of earth drilling, underground chambers, shaft equipment, etc., can solve the problems of inapplicability

Active Publication Date: 2021-02-02
CCCC TUNNEL ENG +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiency that the existing earth pressure shield is not suitable for the separate initiation construction operation of the water-rich sand and pebble formation, the present invention provides a separate initiation construction method of the mud-water shield in the water-rich sand and pebble formation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Slurry shield split launching construction method for water-rich sandy gravel stratum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] Step A, the door is sealed and the warehouse is built.

[0114] A1. Apply grease to the portal brush, that is, before the shield tunnel is jacked up, apply the portal brush Ⅰ7 and portal brush Ⅱ8 with shield tail grease. Preferably, use hand-applied shield tail grease, and let the grease cover every steel wire as much as possible to ensure the sealing of the hole brush.

[0115] A2. The hole is broken, and the shield cutter head is driven to the face of the tunnel, that is:

[0116] According to the length of the short sleeve 4 (70cm) and the length of the shield cutter head 1 (92cm), the thickness of the ground connection wall 6 at the entrance is determined to be 70cm;

[0117] After the hole is broken, the shield is jacked into the short sleeve 4;

[0118] After the jacking of the shield machine is completed, the distance between the shield cutterhead 1 and the ground wall 6 is 5 cm, and the root of the cutterhead leaves the shield tail brush inside the short sleev...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a slurry shield split launching construction method for a water-rich sandy gravel stratum. The method comprises the following steps that A, a tunnel portal is sealed to build abin, grease is smeared on a tunnel portal brush, the tunnel portal is broken, a shield cutter head is jacked into a tunnel face, the grease is injected into a short sleeve and a muddy water bin, mudis injected into the muddy water bin, and the pressure is gradually increased to calculated incision pressure; B, shield tunneling and trolley transfer construction are conducted, a trolley is arranged before shield launching, the trolley is straightened, the tunnel portal is sealed, and the trolley is lowered into a well; and C, secondary switching of the trolley is conducted, outage and pressuremaintaining are conducted, slurry with the viscosity of 35-50s and the density of 1.1-1.3g/cm<3> is used, and permeation is conducted on the tunnel face in a large circulation mode; and slurry with the viscosity of 90-120s is injected into the muddy water bin from a central rotation standby uppermost flushing pipeline to replace the slurry in the muddy water bin, and the pressure of the muddy water bin is maintained. The method has the beneficial effects that the process is reasonable, the stability of the tunnel face of the water-rich sandy gravel stratum is guaranteed under the condition ofoutage, the high efficiency of slurry shield split launching is realized, and the cost is reduced.

Description

technical field [0001] The invention relates to a split-body starting method of shield tunneling, in particular to a split-starting construction method of mud-water shield tunneling in water-rich sand and pebble formations, and belongs to the technical field of tunnel engineering. Background technique [0002] With the large-scale construction of urban subways, large-scale river-crossing tunnel projects and water diversion projects, and with the use of urban underground space extending to deeper strata, shield construction will face complex geological conditions of large groundwater pressure, and muddy water Due to its mud-water balance process characteristics, shield tunneling is more suitable for construction under high water pressure geological conditions, which makes the mud-water shield tunneling technology more and more widely used. [0003] During the construction of urban shield tunnels, due to site reasons, the size of the shield launch shaft is generally small, whi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/08E21D9/093E21D11/10
CPCE21D9/08E21D9/0607E21D9/093E21D11/10
Inventor 干聪豫刘泓志赵亮曹英贵莫康康左世荣张晗硕孙舒楠张伟周子忱龙文选包祥东
Owner CCCC TUNNEL ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap